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N-doped CoO nanowire arrays as efficient electrocatalysts for oxygen evolution reaction

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Journal of Energy Chemistry 2019年第10期28卷 13-17页

作者： Kaili Zhang Xinhui Xia shengjue deng Dong Xie Yangfan Lu Yadong Wang Jianbo Wu Xiuli Wang Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of Materials Science & EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil EngineeringDongguan University of TechnologyDongguan 523808GuangdongChina School of Engineering Nanyang Polytechnic569830Singapore Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou UniversityTaizhou 318000ZhejiangChina

Rational design of cost-effective high-performance electrocatalysts for oxygen evolution reaction (OER) is of great significance for electrochemical water splitting. Herein, we adopt a nitrogen doping method to fabricate self-supported N-doped CoO nanowire arrays (N-CoO) as active electrocatalysts via a facile hydrothermal combined doping method. The N-CoO nanowires are strongly composited with the carbon cloth substrate forming free-standing electrode with reinforced stability and high electronic conductivity. Owing to the increased accessible and electroactive areas, rich/short pathways for charge transfer and enhanced electronic conductivity, the N-CoO electrode exhibits excellent electrocatalytic performance for OER with a low overpotential (319 mV at 10 mA cm^-2 and 410 mV at 100 mA cm^-2) and a low Tafel slope of 74 mV dec^-1 as well as superior long-term stability with no decay in 24 h continuous test in alkaline solution. Our reported design and optimization strategy provide a promising way to construct interesting well-aligned arrays for application in energy storage and conversion.

关键词： Oxygen evolution reaction Nanowires Electrocatalysis Porous structure Cobalt Oxides

Nitrogen-Doped Sponge Ni Fibers as Highly Effcient Electrocatalysts for Oxygen Evolution Reaction

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Nano-Micro Letters 2019年第2期11卷 37-47页

作者： Kaili Zhang Xinhui Xia shengjue deng Yu Zhong Dong Xie Guoxiang Pan Jianbo Wu Qi Liu Xiuli Wang Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang ProvinceDepartment of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil EngineeringDongguan University of TechnologyDongguan 523808People’s Republic of China Department of Materials Chemistry Huzhou UniversityHuzhou 313000People’s Republic of China Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou UniversityTaizhou 318000People’s Republic of China Department of Physics City University of Hong KongKowloon 999077Hong Kong Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Controllable synthesis of highly active micro/nanostructured metal electrocatalysts for oxygen evolution reaction(OER) is a particularly significant and challenging ***,we report a 3D porous sponge-like Ni material,prepared by a facile hydrothermal method and consisting of cross-linked micro/nanofibers,as an integrated binder-free OER *** further enhance the electrocatalytic performance,an N-doping strategy is applied to obtain N-doped sponge Ni(N-SN) for the first time,via NH3 *** to the combination of the unique conductive sponge structure and N doping,the as-obtainedN-SN material shows improved conductivity and a higher number of active sites,resulting in enhanced OER performance and excellent ***,N-SN exhibits a low overpotential of 365 mV at 100 mA cm-2 and an extremely small Tafel slope of 33 mV dec-1,as well as superior long-term stability,outperforming unmodified sponge ***,the combination of X-ray photoelectron spectroscopy and near-edge X-ray adsorption fine structure analyses shows that γ-NiOOH is the surface-active phase for ***,the combination of conductive sponge structure and N-doping modification opens a new avenue for fabricating new types of high-performance electrodes with application in electrochemical energy conversion devices.

关键词： Oxygen evolution reaction Electrocatalysis Nickel Sponge Structure Electrochemical energy conversion

High?Index?Faceted Ni_3S_2 Branch Arrays as Bifunctional Electrocatalysts for Efficient Water Splitting

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Nano-Micro Letters 2019年第1期11卷 205-216页

作者： shengjue deng Kaili Zhang Dong Xie Yan Zhang Yongqi Zhang Yadong Wang Jianbo Wu Xiuli Wang Hong Jin Fan Xinhui Xia Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and Department of Materials Science and Engineering Zhejiang University Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil Engineering Dongguan University of Technology School of Physical and Mathematical Sciences Nanyang Technological University School of Engineering Nanyang Polytechnic Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou University

For efficient electrolysis of water for hydrogen generation or other valueadded chemicals, it is highly relevant to develop low-temperature synthesis of low-cost and high-e ciency metal sulfide electrocatalysts on a large scale. Herein, we construct a new core–branch array and binder-free electrode by growing Ni_3S_2 nanoflake branches on an atomic-layer-deposited(ALD) TiO_2 skeleton. Through induced growth on the ALD-TiO_2 backbone, cross-linked Ni_3S_2 nanoflake branches with exposed { 210} highindex facets are uniformly anchored to the preformed TiO_2 core forming an integrated electrocatalyst. Such a core–branch array structure possesses large active surface area, uniform porous structure, and rich active sites of the exposed { 210 } high-index facet in the Ni_3S_2 nanoflake. Accordingly, the TiO_2@Ni_3S_2 core/branch arrays exhibit remarkable electrocatalytic activities in an alkaline medium, with lower overpotentials for both oxygen evolution reaction(220 mV at 10 mA cm^(-2)) and hydrogen evolution reaction(112 m V at 10 mA cm^(-2)), which are better than those of other Ni_3S_2 counterparts. Stable overall water splitting based on this bifunctional electrolyzer is also demonstrated.

关键词： Nickel sulfide Core/branch arrays Porous film Bifunctional electrocatalysts Electrochemical water splitting Oxygen evolution reaction(OER) Hydrogen evolution reaction(HER)

TiC/C core/shell nanowires arrays as advanced anode of sodium ion batteries

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Chinese Chemical Letters 2020年第3期31卷 846-850页

作者： Yanbin Shen Yahao Li shengjue deng Guoxiang Pan Qinqin Xiong Xiaokun Ding Yangfan Lu Qi Liu Xinhui Xia Xiuli Wang Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Department of Materials Chemistry Huzhou UniversityHuzhou 313000China College of Materials and Environmental Engineering Hangzhou Dianzi UniversityHangzhou 310018China Department of Chemistry Zhejiang UniversityHangzhou 310027China Department of Physics City University of Hong KongHong Kong 999077China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

High-perfo rmance anodes of sodium ion batteries(SIBs)largely depends on rational architecture design and binder-free smart ***,we report TiC/C core/shell nanowires arrays prepared by a one-step chemical vapor deposition(CVD)method and apply it as the anode of SIBs for the first *** conductive TiC core is intimately decorated with carbon *** as-obtained TiC/C nanowires are homogeneously grown on the substrate and show core/shell heterostructure and porous architecture with high electronic conductivity and reinforced *** to these merits,the TiC/C electrode displays good rate performance and outstanding cycling performance with a capacity of 135.3 mAh/g at 0.1 A/g and superior capacity retention of 90.14%after 1000 cycles at 2 A/*** reported strategy would provide a promising way to construct binder-free arrays electrodes for sodium ion storage.

关键词： Sodium ion batteries Nanowires Core/shell structure Carbon Titanium carbide

Assembling Co_9S_8 nanoflakes on Co_3O_4 nanowires as advanced core/shell electrocatalysts for oxygen evolution reaction

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Journal of Energy Chemistry 2017年第6期26卷 1203-1209页

作者： shengjue deng Shenghui Shen Yu Zhong Kaili Zhang Jianbo Wu Xiuli Wang Xinhui Xia Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering Zhejiang University Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou University

Rational design of advanced cost-effective electrocatalysts is vital for the development of water electrolysis. Herein, we report a novel binder-free efficient CoS@CoOcore/shell electrocatalysts for oxygen evolution reaction（OER） via a combined hydrothermal-sulfurization method. The sulfurized net-like CoSnanoflakes are strongly anchored on the CoOnanowire core forming self-supported binder-free core/shell electrocatalysts. Positive advantages including larger active surface area of CoSnanoflakes,and reinforced structural stability are achieved in the CoS@CoOcore/shell arrays. The OER performances of the CoS@CoOcore/shell arrays are thoroughly tested and enhanced electrocatalytic performance with lower over-potential(260 m V at 20 m A cm) and smaller Tafel slopes（56 mV dec-1） as well as long-term durability are demonstrated in alkaline medium. Our proposed core/shell smart design may provide a new way to construct other advanced binder-free electrocatalysts for applications in electrochemical catalysis.

关键词： Metal sulfides Nanoflakes Nanowires Core/shell arrays Electrocatalysis Oxygen evolution reaction

Directional construction of Cu2S branch arrays for advanced oxygen evolution reaction

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Journal of Energy Chemistry 2019年第12期28卷 61-67页

作者： shengjue deng Yanbin Shen Dong Xie Yangfan Lu Xiaolong Yu Liang Yang Xiuli Wang Xinhui Xia Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of Materials Science EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil EngineeringDongguan University of TechnologyDongguan 523808GuangdongChina State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou 570228HainanChina

Metal sulphide electrocatalyst is considered as one of the most promising low-cost candidates for oxygen evolution reaction(OER).In this work,we report a novel free-standing Cu2S branch array via a facile TiO2-induced electrodeposition-sulfurization ***,cross-linked Cu2S nanoflake branch is strongly anchored on the TiO2 backbone forming high-quality Cu2S/TiO2/Cu2S core-branch *** branch formation mechanism is also *** compared to the pure Cu2S nanowire arrays,the asprepared Cu2S/TiO2/Cu2S core-branch arrays show much better alkaline OER performance with lower overpotential(284 mV at 10 mA cm^-2)and smaller Tafel slope(72 dec-1)as well as enhanced longterm durability mainly due to larger exposed area and more active electrocatalytic *** work provides a new way for construction of advanced metal sulphide electrocatalysts for electrochemical energy conversion.

关键词： Copper sulphide Titanium oxide Core-branch arrays Water splitting Oxygen evolution reaction

Facile synthesis and photoelectrochemical properties of novel TiN/C3N4/CdS nanotube core/shell arrays

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Chinese Journal of Catalysis 2020年第10期41卷 1645-1653页

作者： Changzhi Ai Li Tong Zhipeng Wang Xidong Zhang Guizhen Wang shengjue deng Jin Li Shiwei Lin State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou 570228HainanChina School of Materials Science and Engineering Hainan UniversityHaikou 570228HainanChina College of Materials Science and Engineering Zhejiang UniversityHangzhou 310027ZhejiangChina School of Science Hainan UniversityHaikou 570228HainanChina

Recently, the g-C3N4-based heterojunctions have been widely investigated for their greatly enhanced photogenerated carrier separation efficiency. However, most studies are based on the study of g-C3N4 powders. In this study, a novel TiN/C3N4/CdS nanotube arrays core/shell structure is designed to improve the photoelectrochemical catalytic performance of the g-C3N4-based heterojunctions. Among them, TiN nanotube arrays do not respond to simulated solar light, and thus only serve as an excellently conductive nanotube arrays backbone for supporting g-C3N4/CdS heterojunctions. g-C3N4 prepared by simple liquid atomic layer deposition, which possesses appropriate energy band position, mainly acts as the electron acceptor to transport and separate electrons. Deposited CdS quantum dots obtained by successive ionic layer adsorption reaction can effectively absorb visible light and thus act as a light absorber. The TiN/C3N4/CdS nanotube arrays core/shell structure could be verified by X-ray diffractions, Raman spectra, scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy elemental mappings and X-ray photoelectron spectroscopy. Compared with TiN/C3N4 nanotube arrays, the TiN/C3N4/CdS samples greatly improve the photoelectrochemical performance, which can be evaluated by photoelectrochemical tests and photoelectrochemical catalytic degradation. Especially, the optimized photocurrent density of TiN/C3N4/CdS has almost 120 times improvement on TiN/C3N4 at 0 V bias under simulated sunlight, which can be ascribed to the effective expansion of the light absorption range and separation of electron-hole pairs.

关键词： TiN g-C3N4/CdS PEC catalysis Degradation Nanotube arrays

Rational construction of cross-linked porous nickel arrays for efficient oxygen evolution reaction

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Chinese Journal of Catalysis 2019年第7期40卷 1063-1069页

作者： Kaili Zhang shengjue deng Yu Zhong Yadong Wang Jianbo Wu Xiuli Wang Xinhui Xia Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of MaterialsScience and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina School of Engineering Nanyang Polytechnic569830Singapore Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou UniversityTaizhou 318000ZhejiangChina

It is important but challenging to design and fabricate an efficient and cost-effective electrocatalyst for the oxygen evolution reaction(OER). Herein, we report free-standing 3 D nickel arrays with a cross-linked porous structure as interesting and high-performance electrocatalysts for OER via a facile one-step electrodeposition method. The 3 D nickel arrays are strongly anchored on the substrate, forming self-supported electrocatalysts with reinforced structural stability and high electrical conductivity. Because of their increased active surface area, abundant channels for electron/ion transportation and enhanced electronic conductivity, the designed 3 D nickel arrays exhibit superior electrocatalytic OER performance with a low overpotential(496 mV at 50 mA cm–2) and a small Tafel slope(43 mV dec–1) as well as long-term stability(no decay after 24 h) in alkaline solution. Our proposed rational design strategy may open up a new way to construct other advanced 3 D porous materials for widespread application in electrocatalysis.

关键词： Oxygen evolution reaction Nickel arrays Electrocatalysis Porous structure Electrodeposition

Correction to:High‑Index‑Faceted Ni3S2 Branch Arrays as Bifunctional Electrocatalysts for Efficient Water Splitting

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Nano-Micro Letters 2021年第1期13卷 317-318页

作者： shengjue deng Kaili Zhang Dong Xie Yan Zhang Yongqi Zhang Yadong Wang Jianbo Wu Xiuli Wang Hong Jin Fan Xinhui Xia Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil EngineeringDongguan University of TechnologyDongguan 523808People’s Republic of China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore School of Engineering Nanyang PolytechnicSingapore 569830Singapore Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou UniversityTaizhou 318000People’s Republic of China

In the original publication,Figure S4 is an ancillary image to compare the specific surface areas of TiO2/Ni3S2 and Ni3S2 samples and it was incorrectly *** better serve our readers,the correct figure is provided in this *** BET values are correct and *** corresponding figure caption,data analysis and conclusions are not affected and thus not to be *** authors would like to apologize for any inconvenience caused.

关键词： Ni3S2 figure correct